Elastic strap and process of making same



May 21, 1929.A M. N. AARN ELASTIC STRAP AND PROCESS O1. MAKING SAME Filed Dec. 13, 1927 I /f/rfwrof? /Vax /V 4a mi Patented May 21, 1929.A

UNITED ASTATES 1,113,631 PATENT oFFiCaf MAX N. AARON, or PHILADELPHrA,PENNSYLVANIA AssIGNoR 'ro FRIEDBERGER- AARoN MANUFACTURING COMPANY, or PHILADELrHIA, PENNSYLVANIA, A con;

PORATION OF PENN SYLVAN IA.

Apimeafionrfiiea December 13, 1927.` serial No. 239,643.

While it is desirableV to provide a degree of elasticity for shoulder straps for lingerie, elastic Suspenders must necessarilybe substantially thickcr and lheavier than nonelastic suspenders. Thin and light straps are, however, very much preferred, and wearers are willing tosacrifice elasticity to lightness. vFor this reason, such straps are commonlyjmade inelastic.

Theiobject of my invention is to provide a lingerie shoulder strap'iwhich will rc spond tofthc requirements of thinness and lightness and at the same time possess the desired degree of elasticity.

I laccomplish this object by `making` a woven material Vfor such shoulder straps which is inelastic throughout the greater part of'its length and elastic for the smaller part ofk its length. The elastic section and the non-elastic section are integral one with another. This result is accomplished by weaving a known fabric of non-elastic threads and in addition thereto providing a series of elastic warp threads (preferably of rubber) which are bound in by the filler throughout that part of the fabric which it isdesired to make elastic and which float free of the filler throughout the remainder of the fabric; the floating rubber strands being cut out of the fabric after the weaving is completed. During the weaving operation, the rubber strands are under a tension which increases their length substan-` tially beyond the normal, the elastic section of the inished web Vshrinking in length as soon as the pull thereon is relaxed.

In the embodiment of the invention here shown, a part of the inelastic section of web adjacent the elastic section of web is woven to form a pocket within which thecnds of the rubber strands are Vconfined and con cealed.

The invention may be embodied in a ,va-Y

riety of different weaves.

Fig. l is a plan view of a length of web embodying my invention.

Fig.,2 is an enlarged plan view, somewhat-Y diagrammatic, showing one form of weave. The warp is composed of cotton threads a and rubber strands c.

In the inelastic part m of the fabric, the cotton threads a. are boundvin bythe filler threads b in a plain one and one weave.

The rubbery strands c, which are under a pulling strain which elo'n ates them to about threads Aofthe n overlyiiwweb unshaded."

' he' rubber strands c fioattbetween these two webs. The part g/ of the fabric may be (say) halfan inch in length, l j

` In the elasticpart 2 ofthe fabric", the rubber strands c are woven with the filler threads in a plain one and one weave. There are, preferably, two picks of weft b to each change in the shed of cotton warp threads, making a two and one weave in this part of the web. This part of the fabric may be woven to a length of (say) four inches.

The long floating rubber strands c are'cut out of the fabric, While it is under tension, at about the line w-w, near that end of flat section a: adjoining tubular section y. When the tension on the web is relaxed, section 2 instantly vshrinks to (say) half its extended length, and the free ends of rubber'extending beyond section a through tubular sections g/ shrinkto (say) half their extended length, causing them to lie entirely within the tubular section y.

The finished web thus has an integralV In cutting this web into lengths suitable i -forindividual shoulder straps, it is desirable to have the elastic sections z relatively near one end thereof, sothat it doesA not rest over the shoulders. Straps of this character give readily in the movements of the body andconstitute a substantial improve-V ment over straps of uniform characterelastic or inelastic-throughout their length.

In referring to certain threads as inelastic,

I do not mean to imply that the are necessarily absolutely devoid of al elasticity, but that they are inelastic relatively to the elastic threads, which must possess elasticity the tubular section so that, uponrelease oi:- tension, the extremities of the elastic Warp' in a pronounced degree in order to accomplish the purposes of my invention.

What is claimed is l. The process of making an elastic strap including pr'oviding a series of inelastic Warp threads and a series of elastic Warp threads, inter-Weaving filler threads With both the elastic and inelastic Warp threads throughout one part of the length of theV Warp threads While the elasticV Warp threads are elongated by tension, inter-Weaving iller threads with only the inelastic Warp threads throughout a second part of vthe length of the Warp threads to form a tubular section Venclosing the elastic Warp threads, inter- Weaving iller threads with only the inelastic Warp threadsV throughout a third part of I the length of the Warp threads adjacent the said second part to form a flat inelastic section outside of which the elastic Warp threads float, and severing the floating por-l tions ot' the elastic Warp threads adjacent threads Will recede Within said tubular section. j v

2. The process of making straps which comprises providing a series of inelastic Warp threads and a series of elastic Warp threads,

intervveaving filler threads With elastic Warp threads throughout only a part of the length of the Web While said Warp threads are under tension, intertveaving filler threads with inelastic Warp threads throughout the length of the web, the inelasticwarp and the filler being so interwoven as torform tubular sections enclosing the elastic Warp threads at having elastic Warp threads therein, an inelastic tubular portion adjacent'said elastic portion housing the 'ends of the said elastic Warp threads, and a lat inelastic portion devoid of elastic Warp threads adjacent to said tubular portion. Y

In testimony ot which invention, I have hereunto set my hand, at Philadelphia, Pennsylvania, on this 8th day of December,

MAX N. AARON 

